Unit 1 Review

Find the opposite of each number: a) -6.5 b) 9 c) -7 3/4 d) 3.5 e) 2/3

• -6.5

• -9

• 7 3/4

• 3.5

• -2/3

Which of the following scenarios results in no overall change? Select all that apply.

• A cyclist rides 20 miles north and then 20 miles south.

• A swimmer dives 10 feet underwater and then swims 5 feet deeper.

• John earns $50 from a gig and spends $30 on groceries and $20 on a book.

• A car travels 15 miles east and then 15 miles west.

• The stock price increases by 12 points in the morning and decreases by 12 points in the afternoon.

During a cold spell, the temperature on Wednesday was -8° and on Thursday it was -3°. Jess argues that Wednesday was warmer because 8 is greater than 3. Deb disagrees, saying that -8 is colder than -3. Who is correct and why?

• Jess is correct because 8 is greater than 3.

• Deb is correct because -8 is colder than -3.

• Both are correct in their own way.

• Neither is correct.

Decide whether each of these statements describes a positive or negative value. Check the appropriate box.

Jessica owes her mom $25.

• Positive (+)

• Negative (-)

If the temperature is -20° in Denver, how many degrees warmer does it need to get to reach a temperature of 10°?

• 30°

• 10°

• 20°

• 40°

Identify the number with the higher value or select "equal value" if they are identical.

• 30

• |-30|

• equal value

Identify the number with the higher value or select "equal value" if they are identical.

• |30|

• |-30|

• equal value

Identify the number with the higher value or select "equal value" if they are identical.

• |30|

• -30

• equal value

On the number line below, which point(s) are 3 units away from zero?

• -3

• -1

• 0

• 1

• 3

Which of the following points are 4 units away from zero?

• -4

• 0

• 4

• 8